I've been ogling this recipe for awhile but I didn't have a food processor so I could only dream. Now I have one, but it's a large model so I would have to make a double recipe.

My question is: how long will this stuff keep in the fridge? it would probably take me quite awhile to go through all that mayo, and I hate wasting food.

also: does this stuff resemble the storebought Miso Mayo I know and love? I'm sure this recipe is delicious either way, but if I can find a low-fat homemade facsimile of that product I will be on cloud nine.